The ten strata systems that geologists use (Cambrian, Ordovician, Silurian, Devonian, Carboniferous, Permian, Triassic, Jurassic, Cretaceous, and Tertiary) compose the "standard geologic column" and are claimed by many to contain the major proof of evolutionary theory.
These men stood for careful empirical science and were not compelled to believe evolutionary speculation or side with uniformitarian theory.In some locations such structural changes can be supported by physical evidence while elsewhere physical evidence of the disruption may be lacking and special pleading may be required using fossils or radiometric dating.Sandstone, limestone, dolomite, shale, chert, salt, conglomerate, coal and other rock types are not diagnostic of specific strata systems.Therefore, a rock's physical appearance cannot, with certainty, distinguish the system or strata level to which a rock may belong.Although most would be called "progressive creationists" in today's terminology, they would not be pleased to see all the evolutionary baggage that has been loaded onto their classification of strata.The geologic column was not composed by assembling a chronology of "periods," "eras" or other supposed measures of time, but by superposition of objectively defined sequences of sedimentary strata called "systems." The "periods" and "eras" were later appended to the system nomenclature of the "geologic Column" transforming it into a "geologic time scale." The notion that the earth's crust has on "onion skin" structure with successive layers containing all strata systems distributed on a global scale is not according to the facts.
Data from continents and ocean basins show that the ten systems are poorly represented on a global scale: approximately 77% of the earth's surface area on land and under the sea has Only a few locations on earth (about 0.4% of its area) have been described with the succession of the ten systems beneath (west Nepal, west Bolivia, and central Poland).
Even where the ten systems may be present, geologists recognize individual systems to be incomplete.
The entire geologic column, composed of complete strata systems, exists only in the diagrams drawn by geologists!
Hundreds of locations are known where the order of the systems identified by geologists does not match the order of the geologic column.
Strata systems are believed in some places to be inverted, repeated, or inserted where they do not belong.
Overturning, overthrust faulting, or landsliding are frequently maintained as disrupting the order.